A Room-Temperature Portable Terahertz Camera Using Zero Bias Sb-Based Heterostructure Backward Diodes for Imaging Aplications

本研究的目的是探索基于异质结构后向二极管（HBDs）作为检测技术的紧凑、低成本、集成太赫兹（THz）频率成像系统的性能和实现。该方法是利用hbd的独特特性-创纪录的高灵敏度，低噪声和室温工作-与平面天线集成，用于该频率范围内的高性能成像系统。将探索这些组件的集成和交互，包括在亚毫米波通过太赫兹区域运行的原型成像系统的详细设计和仿真、开发和实验演示。为了最大限度地提高分辨率，将采用准光学反向显微镜配置。该计划的智力价值集中在为成像系统协集成这些设备所带来的挑战和机遇上。需要高空间分辨率与紧凑的足迹决定了新的方法成像仪的设计；组件性能、布局和物理实现之间的权衡和交互为评估集成概念提供了理想的测试平台。太赫兹器件和集成技术也有望取得进展。获得的见解也可以在多输入多输出（MIMO）系统和其他环境中找到应用。更广泛的影响包括对教育和创造新工程知识的贡献。系统设计概念将对一系列学科产生影响；亚毫米波和太赫兹成像在医疗诊断、环境和灾害传感以及国土安全方面有应用。在教育方面，研究生将参与设计、开发和原型制作的综合课程，在集成系统设计的重要领域具有卓越的广度。本科生也将参与暑期和荣誉论文研究。

The objective of this research is to explore the performance and realization of compact, potentially low-cost, integrated terahertz (THz)-frequency imaging systems based on heterostructure backward diodes (HBDs) as the detection technology. The approach is to leverage the unique properties of HBDs - record high sensitivity, low noise, and room-temperature operation - integrated with planar antennas for high-performance imaging systems in this frequency range. Integration and interaction of these components will be explored, including detailed design and simulation, development, and experimental demonstration of prototype imaging systems operating in the sub-millimeter-wave through THz regimes. To maximize resolution, a quasi-optical reverse-microscope configuration will be pursued. The program's intellectual merit centers on the challenges and opportunities afforded by co-integrating these devices for imaging systems. The need for high spatial resolution with a compact footprint dictates novel approaches to imager design; the trade-offs and interactions between component performance, layout, and physical implementation provide an ideal test-bed for evaluating integration concepts. Advances in THz device and integration technology are also expected. Insights gained may also find application in multi-input multi-output (MIMO) systems and other contexts. The broader impacts include contributions in both education and the creation of new engineering knowledge. The system design concepts will have impact on a range of disciplines; sub-millimeter-wave and THz imaging has applications in medical diagnostics, environmental and hazard sensing, and homeland security. In terms of education, the graduate students will participate in an integrated program of design, development, and prototyping, with exceptional breadth in the important area of integrated system design. Undergraduates will also be involved through summer and honors thesis research.